my father was an end-stage diabetic. he went blind at age 49. >> reporter: topol uses dna testing and monitoring to guide his daily life. he refuses to use elevators and his day is spent walking from building to building. he incorporates an hour of exercise into virtually every day, no matter how busy. trying to live the life he thinks we'll all be living in the near future. >> how did you find out about that? >> reporter: at lunch we pulled out what we were told is one of his weaknesses, tortilla chips. >> will you partake? >> oh, yeah, it's hard to resist. >> okay, come on. handful. >> reporter: they are loaded with carbohydrates, which trigger glucose. >> yeah, this is my guilty pleasure here. >> reporter: so out comes his cell phone. >> i can look at my glucose every minute. i don't want to look at it every minute, but i can. so i can just turn it on, my glucose. fortunately i haven't had enough chips yet. it's 107. >> how does it know that? >> i have a sensor on. >> where? >> i have it on my abdomen, but i'll show y